Grinding



June 29 1926.

L. R. HEIM.

enmmnq Filed Oct. 20. 1923 3 Sheets-Sheet 1 01): INVENTOR BY mm mmATTORNEY Patented June 29, 1926. l

UNITED STATES PATENT OFFICE.

turns a. mim.

OF DANBURY. CONNECTICUT, ASBIGNOR TO THE ERIN GRINDER:

COMPANY, OF DANBURY, CONNECTICUT, A CORPORATION 01 CONNECTICUT.

GRINDING.

Application filed October 20, 1923. 7 Serial No. 669,651.

.This invention relates to grinding and more particularly to apparatusfor grinding articles or bodies having a round or this invention is toprovide practical grindlowing claims.

ing apparatus for grinding ooncentricall various portions of work havingcorrespon ingly non-uniform diameters or different diameters. Anotherobject is to prov1de apparatus of the above nature that may be readilyadapted to meet the varying conditions. inherent in bodies or wor ofthis character. Another object. is to provide apparatus of the abovecharacter that will be ca able of high speed of operation and hi b yaccurate inits action and results. Qt er objects will be in part obviousor in part pointed out hereinafter. The invention accordingly consistsin the features of construction, combinations of elements, andarrangements of parts as will be exemplified in the structure to beheremafter described and the scope of the ap lication of which will beindicated in the o In the accompanying drawings in which is shown one ofthe various possible embodiment of this invention,

Figure 1 is a plan view of the apparatus in assembled relation, certainparts bein broken away to show certain features 0 construction moreclearly,

Fi "re 2 is a side elevation on an enlarged scale of the work supportingmeans, and more particularly is a side elevation as viewed alongsubstantially the line 2-2 of Fi re 1.

igure 3 is a plan view of the apparatus shownin Figure 2, and

Figure 4 1s a lan view on an enlarged scale of an auxi iary device shownin relation to another characterof work, adapted for use in connectionwith grinding the latter. 7

Figure 5 is a view on an enlarged scale taken along the line 5-5 ofFigure 2, and

Figure 6 is a similarly enlarged view taken along the line 6-6 of Fi re2.

Figure 7 is an enlar' ed sectional view taken along the line 7-- ofFigure 2, and 'Figure 8 is an enlarged sectional view takensubstantially along the line 8-8 of Fi re 2.

igure 9 is a diagrammatic perspective view of part of the a pa'ratusshown in Figure .1 together wit a diagrammatic representation'of certainof the operative mechanisms omitted and broken away in Fi ure 1.

imilar reference characters refer to similar arts throughout the severalviews of the rawings.

Referring now to the drawmgs, and more particularly to Figure 1, thereis shown at 10 a main supportm frame of any suitable construction andheight, and rovided in its upper part with suitable pans of ways 13and14 extending longitudmally thereof for guiding the carriages 11 and12 respectively len hwise of the frame 10. The adjacent en s of thecarria s 11 and 12 support airs of transverse y spaced bearin 15 an 16respectively adapted to rotatabl support the shafts 17 and 18. The shaft1 the'carriage 11 and the frame 10 overhan at the rent parts thereof andupon this overhanging end thereof is sup orted to rotate, with the shaft17, a grinding wheel 22. The shaft 17 has mounted upon it,.andintermediate of the bearing 15 an elongated pulley 19 adapted to bedriven by means of the belt 21 from any suitable source of owe'r. Thegrinding wheel 22 may thus e driven at a suitable grinding speed and isrotated in the direction of the arrow indicated in Figure 1.

The shaft 18, supported in'the bearings 16 of the carriage 12, supportsat its overhanging end at the front art of the machine what willhereinafter termed a re ulating wheel 24 which wheel convenient y andpreferably is made of a suitable abrasive material. A pulle 26 mountedupon shaft 18 and interme late of the spaced bearings 16 is connected toany suitable source of power by'means of a belt run- 105 22 is driven,and moreover, the regulating wheel 24 is rotated in such a directionthat its operative surface, adjacent the operatlye surface of thegrindin wheel 22, trayels m a direction opposite om the d1rect1on oftravel of the surface of the grlndm wheel 22. In Figure 1 thesedirections 0 travel of the adjacent operative surfaces of the two wheelsare clearly indicated by arrows, and'from Figures 7 and 8 it will benoted that the grinding wheel surface 1s thus made to travel downwardlywith respect to a vwork carrier 25 interposed between the two wheels andto be more clearly herelnafter described, and that the regulating wheel24 is thus made to present an oper ative surface which travels upwardlywith." res ct to the carrier 25.

e operative surfaces of the two wheels 22 and 24, indicated respectivelyat 22' and 24, are-arranged in approachm relation with respect to oneanother, an th s relation is preferably and most convcmently attainedbymaking both wheels of a type having peripherally operative surfaces. tthis point it may be noted that the regulating wheel 24 is preferablyand advantageously arranged with respect .to the work supporting meansso that there exists "a relative inclination between the path of travelof the operative surface of the regulatmg wheel 24 and the tangent lineof contact of the work with the surface of the grinding wheel. Byproviding such a relative inclination, the regulatm wheel 24 1seffective to urge the work a ong the carrier and in a direction towardthe rear of the aparatus as viewed in Figure 1, and as ndicated by thearrow 25. This relat ve in,- clination is preferably obtained byinclining the axis of rotation of the regulatm ulating wheel takes t eform of a peri herally active wheel as here illustrated. Thus theforward bearing 16 ad acent tne regulating wheel 24 may be made ofhigher elevation than the rear bearing 16 remote from the regulatingwheel 24. In Figure 2 of the drawings, as well as in Figure 3, thisrelation of the regulating wheel 24 is more clearly shown.

As shown in Figure 1,-the wheels 22 and 24 are substantially enclosed ina protective casing 29, inasmuch as they are operated with anapplication thereto of some suitable cooling fluid such as water. Thecasing 29 is secured to the front part of the main frame 10 in anysuitable manner and is of sufiicient lateral and longitudinal expanse topermit of the adjustment and movement of the wheels as will be moreclearly hereinafter described. At a point substantially intermediate ofthe two wheels 22 and 24 and below their adjacent operative surfaces,this casing 29 is formed to provide a substantially horizontallyextending bridge ortion 29 (see Figure 2) u on which rid e portion 29'is su orte a frame mem er 30 detachably hel in place as by an angleplate 31 having a horizontally extending portion 31 member 30 may besecured, and having also a downwardly extending portion 31 adapted to bedetachably secured, as by the clamping screw 31 passing therethrough andinto the bridge portion 29 of the easing 29. The frame in Figure 3, andas will be clear from Fig ure 2, extends between the two wheels andsupports two vertically extending posts 30 and 30". one on each side ofthe two wheels. These posts 30 and 30 support an elongated auxiliaryframe member 32, taking the orm preferably of a bar which isconveniently of rectangular cross-section. The posts 30 and 30" areslotted vertically as is clearly shown in Fi re 2 and through theseslots and through t e auxiliary frame member'32 pass the clam ingbolts30 and 30 respectively. By t is construction, the frame member 32may be vertically adjusted with respect to the operative surfaces of thetwo wheels, and it will be noted that the vertical adjustment of eachend of the frame member 32 may be made independently of thecorresponding adjustment at the other end ther'eof. Thus, the framemember 32 may be given any desired degree of inclination with respect tothe horizontal as viewed in Figure 2 and which adjustment may bedemanded by the particular conditions of use.

At the forward end ofthe frame member 32 and as shown in Figures 2 and 3at the left hand end thereof, there is mounted a g bracket, generallyindicated at 33, having wheel 24 in the vertical lane where the reg-- alu 33 extendin in the general direction of t e frame mem er 32 and adated to be secured thereto as by means of t e clamping screw 33". Theclamping screw 33" is preferably threaded into the frame member 32 andpasses through a vertically "extending slot 33 in the lu 33. Thus thebracket 33 may be not on y vertically ad- 'usted with respect to theframe member 32, ut also pivotally adjusted about the screw 33 asanaxis. The bracket 33 is formed to provide a transversely extendingplate member 33 (see also Fi res '5 and 6 in general of a rectangular sape, and pro ecting rearwardly therefrom and at the upper portionthereof is a lug 33' into which is threaded an adjusting screw 33"adapted to contact with the upper surface of the frame member 32, thelatter being conveniently recessed as at 32 to accommodate the lug 33'and its associated adjusting screw 33. The adjusting screw 33" throughthe lug 33' acts not only to assist in rigidly supporting the bracket 33with respect to the frame member 32, but also to permit a micrometer to.which the frame member 30, as is shown' r with respect to iary 34, moreclearly shown in This plate member 34 an ers 35 and 36 respectively,

adjustment of the bracket 33 to be made the frame member 32.

The front plate 33 of the bracket 33 has adju'stably mounted thereon aplate member Figures 6 and5. ports at its opposite u per ends a pair 0studs 34 and 34" upon w liCll are rotatably mounted the rolladapted tosuport one end of the work piece eneral Indicated at 37 The rollers 35an 36 have rigidly connected at their left hand faces as viewed inFigure 2 the gears 34 and 34 respectively, so that the rollers may berotated or driven through their res ective gears. The gears 34 and 34mes with gear 38 supported upon a stud 34 substantially centrallypositioned with respect to the late member 34. The gear 38 in turn isdriven from a ear 39 rotatably supported upon a stud 34 rigidl mounted1n the lower end of the plate -34 see Figures 5 and 6). The gear 39 isadapted to be driven through a sleeve 39' at the outer end of which (seeFigures 2 and 3) is mounted a pulley 68. The pulley 68 (see Figure 1) isadapted to be driven by means of the belt 68 selectively connected toany one of the ste s of a cone pulley 68 mounted upon a she t 18' formmga forwardl directed extension of the re lating whee shaft 18.

he work suplporting rollers 35 and 36 (see Fi ure 5) t us in effect mayof themselves etermine the axis about which the one end of the work 37rotates and moreover may take part, through the driving mechanism abovedescribed, in rotating the work 37. As illustrative of the character ofthe work adapted to be operated upon, the work may, for example,comprise a shaft member as shown in Figures 2 and 3 in which therespective end portions 37 and 37 are to be ground concentrically withrespect to one another. The member 37 is shown illustratively in thesefigures in the form of an axle member in which the end portion 37' is tobe reduced or ground to a shape of uniform diameter throughout, whereasthe other end portion 37 is to be ground to tapered form.

As hereinbefore described, the rollers 35 and 36 (Figure 5) support oneend of the work and in effect determine the axis about which this endrotates. As iliustratively shown, the rollers 35 and 36 and theirassociated mounting mechanisms are arranved to sup ort the cylindricalend 37 as distinguis ed from the tapered end portion 37". Consideringnow the manner in which the other end portion (37") is presented to thewheels and supported therebetween for operation thereon, it will benoted that the auxilframe member 32 is under cut on both sides thereofor reduced in section, as at 32",

intermediate of the wheels 22 and 24. Moreover, also, an upper portionof the frame member 32 intermediate of the wheels is cut away to form arecess 32 extendin len thwise of the frame member 32. "he tom wall ofthe recess 32 is downwardly inclined to both the left and ri ht asviewed in Figure '2 to form what may e termed an apex at a substantiallycentral point lengthwise of the recess 32", and at this apex is formed atransversely extendin seat in which rests a roller 32 upon whic ispivoted a carrier member 41. The carrier member 41 extends lengthwise ofthe recess 32 and as clearly shown in Figure 2 extends u wardly beyondthe upper surface of the frame member 32. Referring now to Figure 8, itwill be seen that secured to either side of the carrier member 41, as bythe screws 41 are the downwardly extending plate members 41' and 41, oneon each side of the carrier member 41. These plate members 41' and 41extend downwardly into the lateral recesses 32 of the auxi iary framemember 32 and, in effect,.act to guide the carrier member 41 as it swins about the pivoting roller 32, the latter eing interposed between theapex at the bottom of the recess 32 and a substantially central portionof the carrier 41. The side plates 41 and 41 are each provided with anarcuate slot 41 adjacent their lower ends, a screw 32 passing throughthese slots and into theframe member 32 in order to effectively hold thecarrier 41 in assembled porting surface of the carrier 41, the latter, 71

y reason of its'rocking support, automatically accommodating itself tothe tapered end 37* positioned thereon. At this point it may be notedthat the same self-accommo dating action takes lace if the work piece 37were reversed an the straighter cylindrical end 37 thereof positionedupon the carrier member 41. The upper supportingsurface 41 of thecarrier member 41 (see'Figure 8) is preferably inclined downwardlytoward the regulating wheel 24 in order to tend to urge the portion ofthe work 37 supported thereon toward the regulating wheel 24. A wearstgip 41 is preferably removably inserted in a suitable lengthwiseextending recess in the upper portion of the carrier 41 in order thatthe wear on the carrievmember 41 may be concentrated in this wear strip41 which is preferably of a suitably hardened material, it being notedwise with respect to t end of its possi 30 respectively. are extendedthrough t e upper portions of that as one surface of the member 41becomes worn, the member 41 may either be rotated to present one of itsother surfaces for wear or may even be replaced.

In order, however, to insure positive control of the rotation of thework 37 by the regulating wheel 24, as well as to revent unintendedcontact of the work with the rindin" wheel 24, as will be more clearlyereinafter explained, the auxiliary frame member 32 has mounted thereonand adjacent the two wheels a bracket 69, as by the clamping screw 69".This; bracket 69, preferably positioned on the grindin Wheel side of theauxiliary frame mem'er 32, pivotally supports at 69 an arm 69 in the uper end of which is rotatably mounted a rol er 69. At the lower end ofthe arm 69, the latter is recessed as at 69 to provide a housing for aspring 69 which is interposed between the bracket 69 and the lower endof the arm 69. Preferably a pin 69 is rigidly mounted at the lower endofthe bracket 69 to extend into the recess 69 to assist in holding thespring 69 in place. The spring 69 in tendin to expan ur es the roller 69to the le as viewed in Figure 7, and the roller, in substantiallynon-frictionally engaging the work 37 urges the work 37 toward theregulating wheel 24, thus insuring the maintenance of the contact of thework 37 with the regulating wheel 24. 6

Turning now to Figure 2 of the drawings, it will be noted that the framemember 30 is bored out as at 30 preferabl throughout its longitudinalextent in or er to house therein an operating bar 70 preferably ofcircular cross-section, and provided.

at its forward and underside with a rack 70 adapted to mesh with a gear70 suitably mounted at the forward and underside of the frame member 30.

The gear 70 is adapted to be manually ro tated by means of a handle 70',so that upon operation of the handle or lever 70, a sufii cient rotationof the gear 7 0 may be brought about to move the o erating bar 70lengthe housing or frame 30.

In the position shown in Figure 2, the bar 70 occupies a positionsubstantiall at the le movement to the aft.

The operating bar 70 is cut away at two spaced points in its upperportion in order to provide two inclined surfaces 70' and 70,

adapted to coact with the lower end portions 30' and 30 of thesupporting posts 30' and The drtions 30 and 30 the housing or framemember 30, the latter being formed at these parts to provide suitableguiding portions, so that upon a movement to the right, as viewed inFigure 2, of the operating bar 70, the inclined surfaces 7O and 70 movethe supporting posts, 30 and 30", respectively and hence the auxil-Lumen iary frame member 32 with the work u wardl as viewed in Fi re 2.As will 8 seen om Figure 8, sucli a movement carries the work 37 to aposition between more distant portions of the-operative surfaces 24 and22 of the regulating wheel 24 and 22 respectively, it being noted thatduring such movement, the portion 37 of the work 37 is effectivelymalntained out of contact with the grinding wheel 22. Such movement, inresponse to, for example, the manual operation of the operating bar 70may thus be effective to carrythe work out of operative relation to theopposed operative portions of the two wheels, in order, at thecompletion of the desired grinding action, to permit the removal of thework from the apparatus. A new work piece may then be positioned ashereinbefore described, whereupon a reverse movement of the operatingbar 70 is effective to carry the work downwardly and into operativerelation to the.two wheels. A pair of springs 71*? and 72', connectingthe movable frame member 32 with the fixed frame member 30, insure themaintenance of the desired eoacting relation between the supportingposts and the inclined surfaces of the operatin bar 70.

As hereinbe ore noted, the regulatin Wheel 24 is effective to urge theworfi lengthwise of itself and to the rear of the apparatus as shown inFigure 1, in addition to bringing about a control of the rotation of thework about its axis during the grinding operation thereon by thegrinding wheel 22. It will noted that the work 37, being of cumbersomeform, has only a relatively small portion thereof in operative relationto the wheels as compared with relieve the burden on the regulatingwheel of rotating the heavy work piece 37 and materially aid or assistthe regulating wheel. In this connection it might be noted that thesupportin rollers 35 and 36 may be driven at a suite. le speed throughthe belt 68" and the cone pulley 68 commensurate'with the speed at whichthe regulating wheel 24 rotates the work.

At the rear end of the auxiliary frame member 32 and as clearly shown atthe ri ht hand end in both Fi ures 2 and 3, a brac et 71 on the framemem r 32 has threaded into it so as to extend lengthwise of the framemember 32, a stop member '71 taking the form preferably of an elongatedscrew, the position of its left hand end being adjustable at willlengthwise of the frame member 32. A lock nut 71 may 'be employed tolock the work to the right (in Figluies 2 and 3 is thus effective tosecurely d the wor against'the stop member 71? during the rotationthereof b one wheel and the grinding action thereon y the other.

As is clearly shown in Figure 3 and also in Figure 1, it will be seenthat the opposed operative ortions of the two wheels that is, substantialy the tangent lines in which the two wheels contact with the work, makean angle with one another as viewed in the hor-' izontal plane. Thisrelation may be obtained by suitably sha ing the regulating wheel 24(see Figure 1 as by means of a suitable truing device 72, car ing asuitable truing tool such as a diamon and ada ted to be guided along apredetermined pat of travel to give the regulating wheele24 the desiredshape. This angular relation between the opposed operative portions ofthe two wheels is desirable when work of tapered form is to be operatedu on, it being noted that preferably the grinding wheel 22 ismaintained, by means of a suitable truing apparatus 72 in substantiallytrue cylindri- I cal shape for a urpose more particularly to behereinafter ascribed, I

As viewed in both Figures 1 and 3, it will be seen that the regulatingwheel 24 is substantiall sired to be operated upon. The grinding wheel22 presents an o erative surface which is of less extent lengt wise ofthe auxiliary frame 32. In order to insure a high degree of accuracy,the normal accuracy of the two wheels 22 and 24, due to their truedshape, is effectively combined with the high degree of accuracyresulting from a movement of the grinding wheel 22 lengthwise of .thework operated upon and in a direction substantially co-incident with theline of contact of the grinding wheel with the portion of the workoperated upon. As hereinbefore noted, the grinding wheel shaft 17 isdriven by the belt 21 riding over the broad-facedpulley 19. With thisconstruction it will be noted that a substantial movement of thegrinding wheel 22 in the direction of its axis may readily take placewithout disturbing the driving connection. and it may be here pointedout that the desired movement of the grinding wheel 22 lengthwise of thework is preferably brought about in this manner because of itsrelatively greater simplicity and convenience of construction.

broad-faced in order that it may well bac up the end portion of the workde- As seen in Figure 1, the rear portion of the apparatus .is brokenaway and for the sake of simplicity, this rear portion, to ther with thetwo wheels and their driving s afts, is shown in schematic perspectivein Figure 9, 1t being noted, in so far as the actual'details ofconstruction are concerned that reference may be had to my co-pendingappliiaggn, Serial No. 669,693, filed October 20,

Turning now to Fi ure 9, it will be seen that at the rear end 0 theregulating wheel shaft 18 the latter carries a helical gear 33.whichmeshes with and drives a helical gear 34 driv ng the shaft 42suitably supported in convenient bearings. At the left hand and of theshaft 42, the latter carries a crank disk 46 which bears a diametricallyextending T-slot 47 in which is adjustably mounted a crank pin 49. Thecrank pin 49 engages in the slot 64" of an oscillating member 64preferably supported for oscillating movement upon and about a shaft 52extendmg lengthw1se of the main frame and at the rear thereof. Thus asthe crank disk 46 rotates, 1t being noted that the slowly drivenregulating wheel 24 forms a convenient low speed source of ower, the arm64 is oscillated back and orth about the axis of the shaft 52, theextent of its oscillating move ment being determined by the throw of thecrank pin 49. i

The shaft 52 has rigidly secured thereto and adjacent the arm 64, acrank arm 63 carrying at its upper end an arcuate slot 63" through whichextends a in rigidly mounted in the upper end of? the oscillating arm64. Thus as the latter is oscillated by the crank pin 49, the connectingpin 65 transmits the oscillating movement of the arm 64 to the arm 63,the latter in turn swinging with it the upwardly extended arm 56 towhich the rear end of the grinding wheel shaft 19 is connected. Thus,assuming that the pin 65 is locked with respect to the crank arm 63, asby means of the two 0 pcsitely mounted adjusting screws 63 an 63threaded into the opposite endsof the arm 63 and having their endportions extending into the respective ends of the slot 63", the crankarm 63 will be oscillated in exact unison with the oscillating arm 64".Such action, turning now to Figures 1 and 3, is effective to reciprocatethe grinding wheel lengthwise of the work operated upon, it beingnotedthat the length of the stroke of the wheel may be adjusted byadjusting the throw of the crank pin 49.

The conditions of operation may also find it advantageous to permit apause to take place at the end of a stroke in the movements of thegrinding wheel 22 lengthwise of the work. This may be achieved bybacking off th screws 63 and 63 away from Y the grindin one another,thus making a lost-motion connection between the pin and the crank arm63. The length of the pause at the end of a stroke may be readilypredetermined by adjusting the effective length of the slot 63 by meansof the screws 63 and 63'. Any shortening in the length of the stroke ofmovement of the grinding wheel 22, resulting from the inter-positioningin the mechanism of the lost-motion connection, may be compensated forby increasing the stroke of the crank pin 49.

From the foregoing it will be clear that the efiective length of theslot 63 may be readily and conveniently predetermined. It will also benoted, however, that the position of the elfective slot may be likewisepredetermined by the relative adjustment of the screws 63 and 63 withrespect to the crank arm 63. The elfective slot, the ends of which arepredetermined by the ends of the screws 63 and 63, may in effect bemoved transversely of the crank arm 63, thus predetermining also thelocus of operation or of movement of the grinding wheel 22 relative tothe work.

Where the wheels are so related one to another, as herein illustrativelyset forth, that the opposed operative portions of the two wheels make anangle so as to permit the grinding of work to tapered form (as the endportion 37* of the work 37, for ex ample) and in order that the path ofmovement of the grinding wheel 22 may be properly related to the worlcoperated upon, the axis of the work should occupy a position such that,as viewed in Figure 3 for example, it lies in a vertical plane bisectingthe angle between the operative portions of the two wheels. When sorelated with respect to the two wheels, the tapered portion of the workwill be effectively acked up by the re lating wheel on the one sidethereof, an the o posite side of the work will be substantial y alignedwith the path of movement of the grinding wheel 22 relative to the work.In order that this relation may be readily brought about, the framemember 30 is pivoted to the angle plate 31 as at 73 (see Figures 2 and3) whereby the frame member 30 together with the auxiliary frame member32 and associated devices may be swung in a substantially horizontalplane and about the pivot 73 so as to brin the axis of the work 73 intosubstantial y the bi-secting vertical plane of the angle between theoperative contacting portion of the wheel 24 and the path of travellengthwise of the work of the operative contactln portion of wheel 22.Suitab e clamping screws 73* t readed into the frame member 30 andassing through suitable slots 73" in the plate portion 31 of the anglemember 31 may be employed to lock the frame member 30 and associatedjusted sition. At this oint it ma be noted t at, where the end portion 0the work 37 is to be ground to true cylindrical form, (12s for exam lethe portion 37" of the wor piece 37) t e above mentioned adjustment maybe utilized to properly align the end portion of the work with theoperative portions of the two wheels, which, in this case, will besubstantially parallel one to another.

In order that the above described adjustment of the position of theortion 37 of the work 37 with respect to the wheels may be accuratelymade, provision is made for br nging about amicrometer adjustment of theexterior end portion of the work 37 laterally with respect'to the innerportion of the work presented for operation thereon b the wheels. Thus,referring more arparts into adticularly to Figures 5 and 6 and also to iure 2, it will be noted that the plate li e bracket 34 is secured to theplate member 33 of the bracket 33 by means of the two clampmg screws34iand 34" threaded into the plate member 33 and passing throughtransversely extending slots in the plate member 34. The plate member 34(see also Figure 3) is provided with a rearwardly extending lug 34adapted to overlap laterally the plate member 33 of the bracket 33. Anad usting screw 34 passes through the lug 34 and abuts against the platemember 33. By -means of the adjusting screw 34, the relativedisplacement laterally of the bracket 34 with its supporting rollers 35and 36 may be accurately predetermined relative to the bracket 33. Theclamping screws 34 and 34* may, after the adjustment, then lock theparts in adjusted position. Thus it will be seen that the outer end ofthe work may be accurately displaced laterally with res act to the innerend of the work, in or er that the axis of the inner end (37 forexample) may be accurately aligned with respect to the operativeportions of the two wheels.

As hereinbefore described, the auxiliary frame member 32 may bevertically adjusted by means of the slot and bolt connection thereofwith the movable su porting posts 30 and 30". The auxiliary rame member32 may be adjusted with respect to these posts so as to bring the axisof the work operated upon in substantially the same horizontal planewith the locus of operation of the grinding wheel 22, when the operatinglever 1s swung into the position shown in Figure 2 to carry the workportion 37 downwardly between the two wheels for operation thereon. Aair of stops 74 and 74 (see Figure 2) pref drably takm a form of screwsthreaded into suitable a utments in the upper portion of the framemember 30 and one adjacent each of the movable iao supporting posts 30and 30 "may be emregulating wheel 24 holds the work against ployed notonly to make the above described the stop member 71 (see Figures 2 and3) adjustment, but also to limit the downward and that the grindingwheel 22 is being removement of the work when carried into ciprocated ashereinbefore described and operative relation to the two wheels. throughthe mechanism diagrammatically In this connection it may be noted thatshown in Fi ure 9. The stop members 74" the adjusting screw 33 (seeFigure 2). may and 2' 1: (see i ure 2) limit the downward be employed toraise or lower the supporting movement of the work supportingapparollers 35 and 36, thus eter displacement vertically of the exteriorwork may be allowed to remain in its lowend of the work with respect tothe inner ermost position during as many strokes of ermitting amicromratus with the work thereon, whereupon the v 4 end of the work, toinsure the desired rethe grinding wheel 22 lengthwise thereof asmovement of the work supporting apparatus.

lation for positioning of the end portion of the lparticular characteror condition of the the work operated upon with respect to the wor piecemay demand. As the end portwo wheels andthe movement of the rind tion37" is thus being gradually reduced and ing wheel. It will be noted thatas this latground to desired tapered form, the rocking ter adjustment ismade, the carrier member icarrier member 41 automatically accommo- 41hereinbefore described and upon which dates itself to the changes in theconformathe inner end 37 of the work is supported tion of the portion 37of the work, as the automatically aligns itself with respect to twowheels gradually bring this portion of this inner end and thus insuresthe pro er the work to the desired accurate tapered supporting of theportion of the work eshape. The grinding wheel in addition to tween thewheels that is to be operated upon. contributing to the accuracy of therinding From the foregoing, it is believed that the operating by reasonof its trued s ape inoperation of the apparatus will be readily sures avery high degree of accuracv by understood, but by way of brief rsum itreason of its movement lengthwise o the may be noted that with thewheels driven at work, this movement being referably a rethe respectivespeeds hereinbefore described ciprocatory movement in which the pausesand with the su porting rollers 35 and 36 at the end of the stroke mayor may not be driven through the belt 68 at a speed comutilizedaccording to the requirements of mensurate with that of the regulatingwheel the particular character of surface in order thus to insureeffective conu on. Moreover, the wear on the grinding trol of therotation of the work during the W ieel 22 is maintained more uniform asa action thereon by the grinding wheel 22, he result of this movementand thus highly auxiliary frame 32 is carried upwardl by uniform as well,as accurate results are atswinging-the operating lever 70 in cocktained. y \vise direction (see Figure 2), the inclined After thedesired grinding action upon surface 70 and 70 of the operating bar 70the portion 3'2 of-the work has been allowed being'efl'ective to bringabout this upward to take place, the operating lever 70 may be swung inclockwise direction (see Figure The work piece is then placed upon thesup- 2) to carry the work upwardly and between porting mechanisms sothat its one, or inner more distant portions of the operative surend,rests upon the rocking carrier member faces of the two wheels, it beinnoted that 41 and so that its exterior or other end rests during thismovement the work is effectively upon the driven supporting rollers 35and maintained in contact with the regula ing 36. regulating wheelsurface24 to rotate the grinding wheel surface. The work p ece workpiece 37, it being noted that the yieldmay thereupon be removed from thesupably positioned roller 69 (see Figure 7) coporting apparatus andreplaced by another acting with the inclined surface 41 of the workpiece to be ground, when t e ope1a-. carrier member 41 (see Figure 8)acts to tions hereinabove described may be repeated. hold the inner end37 of the work out of In order to accommodate the apparatus contact withthe grinding wheel surface 22 to work of different diameters, thecarriages and in contact with the regulating wheel 11 and 12 (seeFigure 1) may he adjustably surface 24. Thus the desired rotation ofpositioned toward or away from one another the work is initiated. as bymeans of the hand wheels 11 and 12 The operating lever swung in counterclockwise direction (see concentrically arranged and operatively con-Figure 2) whereupon the work supporting nected with their respectivecarriages to apparatus carries the inner end of the work permit amovement thereof and hence of the 37 downwardly as viewed in Figure 2 totwo wheels toward or away from one anpresent this inner end to theopposed operaother, according to the character or diameter tive portionsof the two wheels, it being of the Work operated upon. understood thatthe feeding action of the Work operated The latter at once act to coactwith the .wheel surface and out of contactwith the 70 is thereuponrespectively, these wheels being preferably 1 It will be noted that, asalready hereinbefore described, the bracket 33 may be pivotally adjustedabout the clamping screw 33 with respect to the auxiliary frame member32. Thus, for example, should the end portion 37 (see Fi re 2) of thework be of tapered form, t e bracket 33 with the bracket 34 andsupporting rollers 35 and 36 thereon may be swung in clockwisedirection, forexample, about the clamping screw 33 to align thesupporting surfaces of the rollers 35 and 36 with the tapered end of thework. This ad'ustment may be made for example where t e wheels arerelated to one another to rind the straight or cylindrical portion 3 aof the work 37 in which case the tapered end 37 is supported upon therollers 35 and 36.

Turning now to Figure 4 of the drawings, there is shown an arbor 75having at its one end a cylindrical portion 75 adapted to be supportedupon t e supporting rollers '35 and 36 and having at its other end atapered shank 7 5" upon which is adapted to be positioned a work piece76 illustratively shown in the form of a tapered drill shank, theexterior of which it is desired to reduce to true ta ered form. By thusassembling the shank 6 with respect to the arbor 75, the former may beground in substantially the same manner as the ta ered end portion 37 bof the work 37 (see igure 2) hereinabove illustratively set forth. Withsuch an arrangement, the advantages achieved in grindin work ofelongated form may be effective y attained with work of short lengths,and the parts shown in Figure 4= are merely illustrative ofanarrangement for supporting work of short lengths in a manner toachieve the advantages above mentioned. It is therefore to be understoodthat the term work iece or 'work as hereinbefore or as hereinafter used,is to be interpretedas inclusive of such an arrangement as isillustratively shown in Figure 4 as hereinabove described.

The rockin carrier member 41 will thus be seen to insure the rigidsupporting throughout substantially its entire length of that endportion of the work presented to the wheels for action thereon, theother end of the work being reliably supported u n the rollers 35 and36. Chattering is t us effectively avoided since the carrier member 41,in automatically accommodating itself to the end ortion of the work,insures the support 01 this end portion uniformly throughoutsubstantially its entire extent. Moreover, it may be pointed out that,as the rinding proceeds, the right hand end of t e work as viewed inFigure 2 tends to be lowered because of the removal of materialtherefrom by the grinding wheel. As the work 37 thus in effect swingsdownwardly at its right hand end to an extent proare attained.

portional to the amount of material removed from the end portion, therocking carrier member 41 again and continuousl accommodates itself tothe chan 'ng conditions, and thus maintains consistently an effectivesupport of the one end of the work throughout the range of action of thewheels in the direction of the length of the work. Moreover it will alsobe noted that, the outer or left hand end as seen in Figure 2 havingbeen ground to true form, is supporte at that end to rotate about itstrue axis, and this insures, together with the supporting the concentricgrinding of one end of the work with respect to the other.

It will thus be seen that there has'been provided in this invention anap aratus in which the several objects hereinbe ore noted, as well asmany others, are achieved and that many thoroughly ractical advantagesIt wil e seen that the apparatus is of a thoroughly practical nature andhence well adapted to meet the conditions of hard practical use, andthat the apparatus is capable of the achievement of highly uniform andaccurate results. It will moreover also be seen that the apparatus ischaracterized by a high legree of flexibility of adjustment andarrangement and that it may be readily adapted to meet the requirementsof the specific character of work operated upon.

As man possible embodiments may be made of t e above invention and asmany changes might be made in the embodient above set forth, it is to beunderstood that all matter hereinbefore set forth is to be interpretedas illustrative and not in a limit- 1n sense.

claim as my invention:

1. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetween, means for supportingwork of round section in operative relation to said wheels comprising acarri r member positioned between said wheels for supporting one portionof the work and a member positioned exteriorly of said Wheels forsupporting another portion of the work, and means for limiting movementof the work in the direction of its length.

2. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetween means for supportingwork of round section in operative relation to said wheels comprising acarrier member positioned adjacent said wheels for supporting oneportion of the work and a member positioned remote from action of therocking carrier 41,

said ivvheels for supportin another portion of the work, and means or'ving one of said wheels a movement lengt wise of said carrier memberduring its action upon the work. A

3. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round sec-' tion supported therebetween, means-forsupporting work of round section in operative relation to said wheelscomprising a carrier member positioned adjacent said wheels forsupporting one portion of the work and a member positioned remote fromsaid wheels for supporting another portion of the work, and means forreciprocatin one of said wheels with respect to the ot er and in thegeneral direction of the line of contact of said one wheel with thework.

4. In apparatus of the character de scribed, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetween, means for supportingwork of round section in operative relation to said wheels comprising acarrier member positioned adjacent said wheels for supporting oneportion of the work and a rotatable member positioned remote from saidwheels for supporting another portion of the work, means tor rotatingsaid'rotatable member, and means for limiting movement of the work inthe direction of its length.

5. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetwcen; means for supportingwork of round section in operative-relation to said wheels comprising acarrier member positioned adjacent said wheels for supporting oneportion of the work and a rotatable member positioned extcriorly of saidwheels for supporting another portion of the work, means for giving oneof said wheels av movement lengthwise of said carrier member during itsaction on the work, and means for rotating said rotatable member.

' 6.1m apparatus of the character describ d, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetween, means for supportinwork of round section in operative relation to said wheels comprising acarrier member positioned between said wheels for supporting one portionof the work and means positioned exteriorly of said wheels forsupporting another portion of the work and adapted to substantiallydetermine the axis of rotation of said last mentioned portion of thework, and'hheans for adjusting laterally said exteriorl positioned meanswith respect to said carrier member; 7. In apparatus ofthe characterdescribed, in combination, a pair of abrasive wheels adapted forsimultaneous rotatin and grinding action upon work of roun sectionsupported therebetween, means for supporting work of round section inoperative relation to said wheels comprising a carrier member positionedbetween said wheels for supporting oneedportion of the work and meansposition exteriorly of said wheels for supportin another portion of thework and adapte to substantially determine th axis of rotation of saidlast mentioned portion of the work, and means for adjusting verticallysaid exteriorly positioned means with respect to said carrier member.

8. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for a simultaneous rotatin and grinding action uon work of roun section supported there tween and having operativeportions of their adjacent oper ative surfaces more distant from oneanother at one end thereof that at the other end, thereby to grind workto tapered form, a work carrier extending between said wheels forsupporting work of round section in operative relation to said operativeportions of said Wheels, and means for ad'usting said carrier about anaxis substantially transverse to the plane of the angle between theoperative portions of said wheels.

9. In apparatus of the character described, in combination, a pair ofiabrasive wheels adapted for a simultaneous rotating and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind Workto tapered form, a work carrier extending between said wheels forsupporting work of round section in operativc relation to said operativeportions of said wheels, means for adjusting said carrier vertically,and means for adjusting said carrier in a substantially horizontal planeabout a substantially vertically extending axis.

10. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for a simultaneous rotating and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to. grind workto tapered form, a work carrier extending between said wheels forsupporting work of round section in operative relation to said operativeportions of said wheels, means mounting said carrier ion Ill)

to permit said carrier to be adjustably swung about a substantiallyvertically extending axis, and means for locking said carrier inadjusted position with respect to said axis.

11. In apparatus of the character described, in combination, a pair ofabrasive wheels having approachin operative surfaces and adapted forsimu taneous rotating and grinding action u on work of round sectionsupported there etween, means for supporting work of round section inope-rative relation to said wheels comprising a carrier memberpositioned adjacent said wheels for supporting one portion of the workand means positioned remote from said wheels for supportin anotherportion of the work, means for imiting movement of the work in thedirection of its len h, and means for moving said carrier mem r relativeto said approaching operative surfaces to carry the portion of the worksup orted thereon to a osition between more istant portions of theoperative surfaces of said two wheels.

12. In apparatus of the character described, in combination, a pair ofabrasive wheels having a proachin operative surfaces and adapte for simutaneous rotating and grinding action u on work of roun section supportedthere etween, means for supporting Work of round section in operativerelation to said wheels comprising a carrier member positioned betweensaid wheels for supporting one dportion of the work and means positioneexteriorly of said wheels for supporting another portion of the work,and means for movin said work supporting means in a direction to carrythe portion of the work supported upon said carrier member toEpOSll'JOIl bebetween more distant portions of the approaching operativesurfaces of said two wheels.

13. In apparatus of the character described, in combination, a pair ofabrasive wheels having approachin operative surfaces and adapted forsimu taneous rotating and grinding action upon work of round sectionsupported therebetween, means for supporting work of round section inoperative relation to said wheels comprising a carrier member positionedadjacent said wheels for supporting one portion of the work and meanspositioned remote from said wheels for sup orting another portion of thework, means or ad ustably positioning said work supporting means about asubstantially vertica ly extending axis, and means for moving saidcarrier member in a direction to carry the portion of the work supportedthereon to a position between more distant parts of the approachingoperative surfaces of said two wheels.

14. In apparatus of the character described, in combination, a pair ofvabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round se tion supported therebetwecn, and means forsupportin work of round section in operative relation to said wheelscomprisingnieans positioned extoriorly of said wheels for supporting oneportion of the work and a selfad usting carrier member positionedbetween. said wheels for supporting another portion of the work inoperative relation to said wheels. i

15. In apparatus of the character de-. scribed, in combination, a pairof abrasive wheels adapted for simultaneous rotating and grinding actionu on work of round section supported there tween, means positionedremote from said wheels for supporting one portion of the work, and afloating carrier member positioned adjacent the wheels for supportinganother ortion of the work in operative relation t icreto and adapted toalign itself with res ect to the portion of the work su ported t iereby.

16. In apparatus oi the character described, in combination, a pair ofabrasive wheels adapted for simultaneously rotating and grinding actionupon work of round section supported therebetween, means positionedremote from said wheels for supporting one portion of the work, and acarrier member positioned adjacent said wheels for supporting anotherortion of the work in operative relation t ereto and mounted to swingabout a substantially horizontal axis.

17. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetwecn, means for supportingwork of round section in operative relation to said wheels having acarrier member extending between said wheels for supporting one portionof the work and means positioned exteriorly of said wheels forsupporting another portion of the work, means mounting said sup ortingmeans to permit adjustment thereo toward or away from one of saidwheels, and means adapted to permit relative adjustment between saidcarrier member and said exicriorly positioned means laterally withrespect to one another.

18. In apparatus of the character de scribed, in combination, a pair ofabrasive wheels adapted for a simultaneous rotating and grinding actionu )on work of round section supported there etween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind workto tapered form, means for supporting work of round section in operativerelation to said wheels comprising spaced supporting members, one ofwhich is positioned between said wheels for supporting another portionof the work, and

means for ad'usting said supporting means about an axis substantiallytransverse to the lane of the an le between the operative portions ofsaid w eels.

19.- In apparatus of the character described, in combination, a pair'ofabrasive wheels adapted for a simultaneous rotatin and grinding action uon work of roun section supported there etween and having operativeportions of their adjacent operatwo surfaces more distant from-oneanother at one end thereof than at the other end, thereby to grind workto tapered. form,

means for sup orting work of round section in operative re ation to saidwheels comprising spaced supporting members, one of which is positionedadjacent said wheels for supporting one portion of the work in o rativerelat1on thereto and-the other of w ich is positioned remote from saidwheels for supporting another portion of the work, means for ad'ustingsaid supporting means about an axissubstantially transverse to .theplane of the angle between the operative ortions of said wheels, andmeans for adusti'n one of said spaced carrier members laterally withrespect tothe other.

20. In apparatus of the character described, in combination, a pair'ofabrasive wheels adapted for simultaneous rotating and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind workto tapered term, means for supporting work of round section in operativerelation to said wheels comprising spaced supporting members, one ofwhich is positioned adjacent said wheels for supporting one portion ofthe work in o rativc relation thereto and the other of w 'ch ispositioncd remote from said wheels for supporting another portion of thework, means for adjusting said supporting means about an axissubstantially transverse to the plane of the angle between the operativeportions of said wheels, and means for adjusting one of said spacedcarrier members vertically with respect to the other.

21. In apparatus of the character .described, in combination, a carrierfor supporting thereon work of round section, a regulating wheelpositioned on one side of said carrier and adapted to be rotated at arelatively low speed, thereby to control the rotation of said work onsaid carrier, a grinding wheel positioned on the other side of saidcarrier and adapted to be rotated at a relatively high speed, andadditional means for rotating the work on said carrier.

22. In apparatus of the character described, in combination, a carrierfor sup porting thereon work of round section, a regulating wheelpositioned on one side of said carrier and adapted to be rotated at arelat vely low 8 eed, thereby to control the rotation of sai work onsaid carrier, :1 grmding wheel positioned on the other side of sa1d,carrier and ada ted to be rotated at a relatively high spee and meansacting independently of said carrier for holding the work in contactwith said regulating wheel.

23. In apparatus of the character described, in combination, a carrierfor supporting thereon work of round section, a

regulating wheel positioned on one side of I said carrier and adapted tobe rotated at a relatively low s ed, thereby to control the rotation ofsai work on said carrier, a grinding wheel positioned on the other sideof said carrier and adapted to be rotated at a relatively high speed,additional means for rotating said work on said carrier, and means forgiving said grinding wheel a movement lengthwise of said carrier.

24. In apparatus of the character described, in combination, a grindingwheel adapted to be rotated at a relatively high speed, a regulatinwheel adapted to be rotated at a relative y low speed, said wheels beingadapted to present adjacent operative surfaces traveling in oppositedirections, a pair of spaced carrier members, one of which is positionedadjacent said wheels for su porting one portion of the, work inoperatlve relation to said wheels and the other of which is positionedremote from said wheels for supporting another portion of the work, andmeans positioned intermediate of said two spaced carrier members forholding the work supported thereon in contact with said regulatingwheel.

25. In apparatus of the character scribed, in combination, a grindingwheel adapted to be rotated at a relatively high speed, a regulatingwheel adapted to he rotated at a relatively low speed, said wheels beingadapted to present adjacent operative surfaces traveling in oppositedirections, a pair of spaced carrier members, one of which is positionedadjacent said wheels for supporting one portion of the work in operativerelation to said wheels and the other of which is positioned remote fromsaid wheels for supporting another portion of the work, and a rollermember yieldingly urged against the work on the side thereof remote fromsaid regulating'wheel.

26. In apparatus of the character described, in combination, a grindingwheel adapted to be rotated at a relatively high speed, a regulatingwheel ada ted to be retated at a relatively .low spec said wheels. beingadapted to present adjacent approachltd till

ing operative surfaces traveling in opposite directions, means forsupporting work of iound section in operative relation to said wheels,means for moving said supporting means in a direction to carry the workinto or out of operative relation to said wheils, and a roller membercontacting with the work and adapted to urge the latter away from thegrinding wheel surface during movement of said supporting means.

27. In apparatus of the character described, in combination, a grindingwheel adapted to be rotated at a relatively high speed, a regulatingwheel ada tedto be retated at a relatively low t-(peer said wheels beingadapted to present a jacent approaching operative surfaces traveling inopposite directions, means for supporting work of round section inoperative relation to said wheels, means for moving said supportingmeans in a direction to carry the Work into or out of operative relationto said wheels, and a roller member mounted upon said supporting meansto be movable therewith and yieldingly urging the work thereon towardsaid regulating wheel.

28. In apparatus of the character de scribed, in combination, a pair ofabrasive wheels adapted for a simultaneous rotating and grinding actionupon work of round sections supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind workto tapered form, an elongated frame member extended between theoperative surfaces of said two wheels, means mounted adjacent the end ofsaid frame member remote from said wheels for rotatably supporting oneend of the work, a carrier member adjacent said wheels for supportinganother portion of the work, and means mounting said carrier member uponsaid frame member adapted to permit said carrier member to align itselfwith respect to the portion of the work supported thereon.

29. in apparatus of the character described, in combination, a pair ofabrasive wheels adapted for a simultaneous rotating and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more dist ant from oneanother at one end thereof than at the other end, thereby to grind workto tapered form, an elongated frame member extended between theoperative surfaces of said two wheels, carrier means mounted upon saidframe member for su iportilw one end of the work, a carrier memberrockingly mounted upon said frame member and adjacent said two wheelsfor supporting another portion of the work and means for angularlyadjusting said frame member in a plane substantially parallel to theplane of the angle between said opposed operative portions of said twowhee 30. In apparatus of the character described, in combination, a pairof abrasive wheels adapted for a simultaneous rotating and grindingaction upon work of round sectionsupported therebetween and havingoperatlve portions of their adjacent operative surfaces more distantfrom one another at one end thereof than at the other end, thereby togrind work to tapered form, an elongated frame member extended bctweenthe operative surfaces of said two wheels, carrier means mounted uponsaid frame member for supporting one end of the work, a carriermemberrocking] mounted upon said frame member and ad acent said two wheels forsupporting another portion of the work, means for angularly adjustinsaid frame member in a plane substantiall parallel to the angle betweenthe oppose operated portions of said two wheels, and means for adjustinglaterally one of said carrier members with respect to said frame member.

31. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for a simultaneous rotatin and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind workto tapered form, an elongated frame member extended between theoperative surfaces of said two wheels, carrier means mounted upon saidframe member for supportin one end of the work, a carrier member rocingl mounted upon said frame member and adjacent said 'two wheels forsupporting another portion of the work, means for angularly adjustingsaid frame member in a plane substantially parallel to the angle betweenthe opposed operated portions of said two wheels, and means foradjusting one of said carrier parts vertically with respect to theother.

32. In apparatus of the character described, in combination, a pair ofabrasive wheels adapted for a simultaneousrotating and grinding actionupon work of round section supported therebetween and having operativeportions of their adjacent operative surfaces more distant from oneanother at one end thereof than at the other end, thereby to grind workto tapered form, a work carrier extending adjacent said wheels forsupporting work of round section in operative relation to said operativeportions of said wheels, means for adjusting said carrier about an axissubstantially transverse to the plane of the angle between the operativeportions of said wheels, and means for giving one of said wheels amovement lengthwise of sad carrier.

1,i'soo,19o V 15 33. In apparatus of the character desaid vwheels andmeans positioned remote scribed, in combination, a pair of abrasive fromsaid wheels for holding another porwheels adapted for simultaneousrotating tion of the work, one of said means being and grinding actionupon work of round arranged to be substantially se1falining 6 sectionsupported therebetween, and an arrelative to the portion of the workengaged 15 rangement for holding work of roundsec-' thereby. tion inoperative relation to said wheels, In testimony whereof, I have signedmy said arrangement including means posiname to this specification thisfirst day tioned adjacent said wheels for holding one of October, 1923.

10 portion of the work in operative relation to LEWIS R. HEIM.

